People often use the words Minor Scale for the Natural Minor Scale indeed.

As you maybe aware off there are many Minor Scales around, so it's not very accurate. I would suggest to keep using the Natural Minor Scale (which is equivalent to the Aeolian mode as Sted already mentioned).

Minor Scale or Natural Minor Scale, it is the same.Prefix "Natural" came as an addition to point at the differencecause there is Harmonic Minor Scale and Melodic Minor Scale, 3 types of minor.That does not happen with major because there is only one type.And yeah, Aeolian is another name, that's one of the church modesand it looks and sounds just like Minor Scale.